From patchwork Thu Jan 17 13:29:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Balaji Pothunoori X-Patchwork-Id: 10768239 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4BB1713BF for ; Thu, 17 Jan 2019 13:29:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 399242FC80 for ; Thu, 17 Jan 2019 13:29:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2D8A02FC7E; Thu, 17 Jan 2019 13:29:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B27882FC7E for ; Thu, 17 Jan 2019 13:29:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727148AbfAQN3e (ORCPT ); Thu, 17 Jan 2019 08:29:34 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:42948 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725868AbfAQN3e (ORCPT ); Thu, 17 Jan 2019 08:29:34 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 78D7C607CA; Thu, 17 Jan 2019 13:29:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547731773; bh=rwNT1Y5pOyjJZ0RQCm0d8sbrf3Hs2dlntDLQM/YpJS4=; h=From:To:Cc:Subject:Date:From; b=VTmabjU6BX5Dm/FkSiOxIf0o5gZRxSdtzIgQ8XEhXp1s/gDsq0JhVhOgm7pidrnYY /lSO4DNoRWHKe1wYp8CNgYczT1ytvK7nyNoQT3M6pQrRbtddxGBexNFQbN9/nwIbgX 7rL5No2rGAGII9Fz/RkTTQpCZ+jcZstcUIpTCMJw= Received: from checstex0244823-lin.qca.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bpothuno@codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 64344605A0; Thu, 17 Jan 2019 13:29:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547731773; bh=rwNT1Y5pOyjJZ0RQCm0d8sbrf3Hs2dlntDLQM/YpJS4=; h=From:To:Cc:Subject:Date:From; b=VTmabjU6BX5Dm/FkSiOxIf0o5gZRxSdtzIgQ8XEhXp1s/gDsq0JhVhOgm7pidrnYY /lSO4DNoRWHKe1wYp8CNgYczT1ytvK7nyNoQT3M6pQrRbtddxGBexNFQbN9/nwIbgX 7rL5No2rGAGII9Fz/RkTTQpCZ+jcZstcUIpTCMJw= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 64344605A0 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=bpothuno@codeaurora.org From: Balaji Pothunoori To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Ashok Raj Nagarajan , Balaji Pothunoori Subject: [PATCH] iw: Add support for controlling tx power for per station Date: Thu, 17 Jan 2019 18:59:24 +0530 Message-Id: <1547731764-14037-1-git-send-email-bpothuno@codeaurora.org> X-Mailer: git-send-email 2.7.4 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ashok Raj Nagarajan This patch allows userspace to set transmit power, in mBm units, to a station associated to the AP. To set a limit tx power of 2000 mBm: iw wlan0 station set txpwr limit 2000 To revert the user defined tx power for a station: iw wlan0 station set txpwr auto iCo-developed-by: Balaji Pothunoori Signed-off-by: Ashok Raj Nagarajan Signed-off-by: Balaji Pothunoori --- station.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/station.c b/station.c index e1477ef..3cce617 100644 --- a/station.c +++ b/station.c @@ -651,6 +651,7 @@ COMMAND(station, del, " [subtype ] [reason-code ]", static const struct cmd *station_set_plink; static const struct cmd *station_set_vlan; static const struct cmd *station_set_mesh_power_mode; +static const struct cmd *station_set_txpwr; static const struct cmd *select_station_cmd(int argc, char **argv) { @@ -662,6 +663,8 @@ static const struct cmd *select_station_cmd(int argc, char **argv) return station_set_vlan; if (strcmp(argv[1], "mesh_power_mode") == 0) return station_set_mesh_power_mode; + if (strcmp(argv[1], "txpwr") == 0) + return station_set_txpwr; return NULL; } @@ -813,6 +816,74 @@ COMMAND_ALIAS(station, set, " mesh_power_mode " "Set link-specific mesh power mode for this station", select_station_cmd, station_set_mesh_power_mode); +static int handle_station_set_txpwr(struct nl80211_state *state, + struct nl_msg *msg, + int argc, char **argv, + enum id_input id) +{ + enum nl80211_tx_power_setting type; + unsigned char mac_addr[ETH_ALEN]; + unsigned int sta_txpwr = 0; + char *err = NULL; + + if (argc != 3 && argc != 4) + return 1; + + if (mac_addr_a2n(mac_addr, argv[0])) { + fprintf(stderr, "invalid mac address\n"); + return 2; + } + + NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); + argc--; + argv++; + + if (strcmp("txpwr", argv[0]) != 0) + return 1; + argc--; + argv++; + + if (!strcmp(argv[0], "auto")) + type = NL80211_TX_POWER_AUTOMATIC; + else if (!strcmp(argv[0], "limit")) + type = NL80211_TX_POWER_LIMITED; + else { + printf("Invalid parameter: %s\n", argv[0]); + return 2; + } + + NLA_PUT_U32(msg, NL80211_ATTR_STA_TX_POWER_SETTING, type); + + if (type != NL80211_TX_POWER_AUTOMATIC) { + if (argc != 2) { + printf("Missing TX power level argument.\n"); + return 2; + } + + argc--; + argv++; + + sta_txpwr = strtoul(argv[0], &err, 0); + + if (sta_txpwr) + NLA_PUT_U32(msg, NL80211_ATTR_STA_TX_POWER, sta_txpwr); + } + + argc--; + argv++; + + if (argc) + return 1; + + return 0; + nla_put_failure: + return -ENOBUFS; +} +COMMAND_ALIAS(station, set, " txpwr []", + NL80211_CMD_SET_STATION, 0, CIB_NETDEV, handle_station_set_txpwr, + "Set Tx power for this station.", + select_station_cmd, station_set_txpwr); + static int handle_station_dump(struct nl80211_state *state, struct nl_msg *msg, int argc, char **argv,